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Finding the Fourth Proportional to 297,989.80, 446,595.90 and 138,047.20

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Solution

The fourth proportional to 297,989.80, 446,595.90 and 138,047.20 is: 206,890.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,989.80 : 446,595.90 = 138,047.20 : x
  2. Step 2: Convert to fraction form
    297,989.80/446,595.90 = 138,047.20/x
  3. Step 3: Cross multiply
    297,989.80x = 446,595.90 × 138,047.20
  4. Step 4: Simplify right side
    297,989.80x = 61,651,313,526.48
  5. Step 5: Solve for x
    x = 61,651,313,526.48/297,989.80
  6. Step 6: Final answer
    x = 206,890.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.